What mass of iron would be need 1450 cal of energy in order to raise its temperature by 19.7 degrees Celsius
Answers
Answer:
The mass of iron needed will be 669.13 grams
Explanation:
The formula to be used here is that of specific heat equation which is
Q = mc Δt
where Q is the heat energy (in calories according to this question) = 1450 cal
m is the mass of the substance being heated (in this case Iron) = unknown
c is the specific heat of the substance (iron) = 0.11 cal/(g. °C)
Δt is the change in temperature in degree celsius = 19.7 °C
From the specific heat equation provided earlier, the mass of Iron needed can be calculated as
m = Q ÷ (c × Δt)
m = 1450 ÷ (0.11 × 19.7)
m = 1450 ÷ 2.167
m = 669.13 grams
The mass of iron needed will be 669.13 grams
NOTE: Kindly consider the units when solving. The reason for the choice of 0.11 cal/(g. °C) as specific heat is because the heat energy was in calories. If the heat energy was in joules, the specific heat of iron would have been different and the unit would have been j/(g. °C).
Related Questions
Find the volume of 20.0 g of benzene
Which two substances bind using a lock-and-key mechanism?enzyme and substrate reactant and substrate substrate and product reactant and product
What is the best description of the Bohr model of the atom?A.)The atom consists of a positively charged material with negatively charged electrons embedded within it. B.)The atom consists of a nucleus with electrons orbiting randomly around it. C.)The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels. D.)The atom consists of a nucleus surrounded by a region containing electrons. Electrons cannot be located exactly within this region, but the probability that they will be found in an area can be stated.
What is the correct IUPAC name for the compound NH4Cl?A. nitrogen chlorideB. nitrogen chlorateC. ammonium chlorideD. ammonium chlorate
Answers
Answer:
The answer to your question is CH₄ + 2O₂ ⇒ CO₂ + 2H₂O
Explanation:
Data
Methane = CH₄
Oxygen = O₂
Process
A combustion reaction is a kind of chemical reaction in which an organic compound reacts with oxygen to generate water and carbon dioxide.
Chemical reaction
CH₄ + O₂ ⇒ CO₂ + H₂O
Reactants Elements Products
1 C 1
4 H 2
2 O 3
Balanced chemical reaction
CH₄ + 2O₂ ⇒ CO₂ + 2H₂O
Reactants Elements Products
1 C 1
4 H 4
4 O 4
Final answer:
The balanced chemical equation for the combustion of methane is CH4 + 2O2 -> CO2 + 2H2O. This equation shows that a methane molecule reacts with two oxygen molecules to produce a carbon dioxide molecule and two water molecules while maintaining a balance as per the Law of Conservation of Mass.
Explanation:
The combustion of methane occurs when methane gas (CH4) combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This reaction can be represented by the following balanced chemical equation:
CH4 + 2O2 -> CO2 + 2H2O
This means that one molecule of methane reacts with 2 molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. The chemical equation is balanced, meaning that the number of atoms of each element is the same on both sides of the equation as required by the Law of Conservation of Mass.
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What is the molecular formula of the alcohol?
Answers
Answer:
Explanation:
For a compound as:
Let say your sample weighs 100 g, then you have
52 g of C
35 g of O
13 g of H
Now you need to calculate the moles in the sample:
moles of C = 52 / 12 = 4.3333
moles of O = 35 / 16 = 2.1875
moles of H = 13 / 1 = 13
Now you divide the moles by the least to have a proportion (2.1875):
moles of C = 4.3333 / 2.1875 = 2
moles of O = 2.1875 / 2.1875 = 1
moles of H = 13 / 2.1875 = 6
So the molecule proportion of atoms is C:H:O = 2:6:1
Now to find x you have to calculate the MM:
MM = 12 * 2x + 1 * 6x + 16 * x = 46x
For x = 1 => MM = 46(1) = 46
For x = 2 => MM = 46(2) = 92
Since the MM is between 30 and 80, x = 1
Answers
Simplify
- C3H4OH(COOH)3
- C3H4OHC3H3O6
- C6H8O7
6carbon
8Hydrogen
7Oxygen
Which substances are the reactants?
Answers
Answer:
reactants: HCl and NaOH
Explanation:
A chemical reaction or equation can be explained with reference of two components: the reactants and products
Reactants are atoms, molecules or ions that are present of the left side of the equation. These could either be a single entity which can break or decompose under a given conditions or they could combine with other entities appropriately to form new molecules, atoms, ions etc. These new molecules occupy the right side of the reaction and are termed as Products.
The given reaction is and acid-base neutralization reaction
HCl + NaOH -----> NaCl + H2O
Reactants:
HCl, hydrochloric acid
NaOH, sodium hydroxide
Products:
NaCl, sodium chloride
H2O, water
A. glass
B. pottery
C. ice
D. gold
Answers
Final answer:
Gold is malleable while glass, pottery, and ice are not.
Explanation:
Malleability is the ability of a material to be hammered or rolled into thin sheets without breaking. Gold is highly malleable and can be shaped into various forms, such as jewelry and gold leaf. Glass, pottery, and ice, on the other hand, are not malleable because they will break or shatter when hammered or rolled into thin sheets.
Gold is malleable because its metallic bonds allow its atoms to slide past one another without breaking. Glass, pottery, and ice lack these bonds and have a more rigid structure, making them non-malleable. Instead, glass and pottery are brittle, while ice can fracture under stress due to its molecular structure.
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Answers
Final answer:
Group 16 elements, also known as chalcogens, commonly react with nonmetals to form compounds.
Explanation:
In chemistry, group 16 elements are known as the chalcogens. Chalcogens react with various groups of elements, including metals and nonmetals. However, their reactions with nonmetals are more common.For example, sulfur (group 16) readily reacts with most nonmetals to form compounds. The resulting compounds can vary depending on the specific nonmetal involved. Therefore, the group that would most likely react with group 16 to form a compound is the nonmetals group.
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